Trane Precedent YSJ072 Installation, Operation And Maintenance Manual page 37

Figure 53. Detail view of DAS tubing after converting
to horizontal
TCO1 Instructions
Note: For complete Gas Heat User information, Operation,
Start-up, Shutdown and Maintenance refer to
Heat Operation and Maintenance," p.
Figure 54. TCO1 instructions
6 to 12.5 Ton Units – two-stage gas
Note: The TCO1 switch is attached by two screws in the
location shown. The switch has short legs on it so
use caution when sliding out of vestibule face during
removal.
Return Air Smoke Detector
The factory installed return air smoke detector is installed in
the downflow discharge position for 15 to 25 ton units. No
additional field setup is required.
If a unit is to be converted to horizontal discharge, for 15 to
25 ton units, the following conversion must be performed.
1. If the unit has an economizer, it must be pulled out in
RT-SVX071D-EN
Slide bracket down to
open hole in vertical tube
Vertical slide bracket -
new position
"Gas
68.
Location of TCO1 limit
to be installed
If the unit being installed has a different TCO1 value than
listed in , the limit control TCO1 must be replaced with the
extra limit control shipped in the heater compartment.
Replace TCO1 following the instructions in steps 1 through
3 below. If the unit being installed does not need to replace
TCO1 limit switch, skip steps 1 through 3 and proceed to
the next step in the installation process.
1. Remove the heat section access panel.
2. Remove TCO1 from shipping location, which is either
attached to the combustion blower motor (6 to 12.5
tons) or to the installed TCO1 limit switch (15 to 25
tons).
3. Replace and discard the existing TCO1 originally
installed at the factory for down flow operation with the
TCO1 shipped which is either attached to the
combustion blower motor (6 to 12.5 tons) or to the
installed TCO1 limit switch (15 to 25 tons) for horizontal
operation.
4. Replace heat section access panel.
15 to 25 Ton Units – two-stage gas
the operating position.
2. Remove the two screws from the mounting brackets.
Note: Refer to downflow view for screw locations of 15
to 25 ton units.
Installation
Additional TCO1 limit switch
to be used for horizontal discharge
field conversion
Location of TCO1 limit
to be installed
37